how do you change the settings? i'm pretty new to the whole bb thing and my curve is less than 1 month old. is it setting in screen/keyboard with the slow/fast/normal option?

If it's only a month old it sounds like you may have gotten something in it. Been to the beach lately??..lol. There is a detailed thread on how to clean it here. I wouldn't change the sensitivity, you need to get the gunk out of the ball or it will get worse over time and a month old is too young to be losing it.